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瓦斯系统是炼化企业能源系统的重要组成部分,对瓦斯系统进行优化,对于炼厂装置的平稳运行及节能具有重要意义。炼厂瓦斯系统主要基于经验进行管理,缺乏专业的优化工具支撑,无法快速回应因生产工况变化造成的系统波动。针对瓦斯系统中存在的问题,建立了瓦斯系统优化模型。瓦斯系统优化模型综合考虑了瓦斯系统的物料平衡约束、热量平衡约束、装置工艺约束等约束条件,采用优化建模软件Lingo求解,计算得到瓦斯系统优化方案。实施效果表明,该模型可有效降低瓦斯系统的运行成本,每年通过调节重整装置燃料配比可获得经济效益12.95万元,通过加热炉氧含量优化获得经济效益26.83万元,通过常减压装置燃料配比优化获得经济效益11.38万元,通过外补天然气量优化获得经济效益260.10万元,总效益达到311.26万元。
Gas system is an important part of the energy system of a refinery enterprise. Optimization of the gas system is of great significance to the smooth operation and energy saving of a refinery plant. Refinery gas system is mainly based on experience management, the lack of professional optimization tool support, can not respond quickly to changes in production conditions caused by system fluctuations. Aiming at the existing problems in gas system, a gas system optimization model is established. The gas system optimization model comprehensively considers the material balance constraints, the heat balance constraints and the device technology constraints of the gas system, and uses optimization software Lingo to solve the gas system optimization scheme. The implementation results show that the model can effectively reduce the operating cost of gas system. The annual economic benefit of 129,500 yuan can be obtained by adjusting the fuel ratio of the reformer, and the economic benefit of 268,800 yuan can be obtained through optimizing the oxygen content in the heating furnace. Through the atmospheric and vacuum distillation unit Optimized fuel ratio to obtain economic benefits of 113,800 yuan, the amount of natural gas through external optimization of economic benefits 26010000 yuan, the total benefit reached 311.26 million yuan.